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Title: Motion detector and analyzer

Abstract

Method and apparatus are provided for deriving positive and negative Doppler spectrum to enable analysis of objects in motion, and particularly, objects having rotary motion. First and second returned radar signals are mixed with internal signals to obtain an in-phase process signal and a quadrature process signal. A broad-band phase shifter shifts the quadrature signal through 90/degree/ relative to the in-phase signal over a predetermined frequency range. A pair of signals is output from the broad-band phase shifter which are then combined to provide a first side band signal which is functionally related to a negative Doppler shift spectrum. The distinct positive and negative Doppler spectra may then be analyzed for the motion characteristics of the object being examined.

Inventors:
Issue Date:
Research Org.:
Los Alamos National Lab., NM (USA)
OSTI Identifier:
7042189
Patent Number(s):
-US-A6029033
Assignee:
TIC; EDB-88-179313
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 42 ENGINEERING; RADAR; DESIGN; DOPPLER EFFECT; ELECTRONIC CIRCUITS; FLOWSHEETS; INVENTIONS; NUMERICAL DATA; DATA; DIAGRAMS; INFORMATION; MEASURING INSTRUMENTS; RANGE FINDERS; 440300* - Miscellaneous Instruments- (-1989); 420800 - Engineering- Electronic Circuits & Devices- (-1989)

Citation Formats

Unruh, W.P. Motion detector and analyzer. United States: N. p., 1987. Web.
Unruh, W.P. Motion detector and analyzer. United States.
Unruh, W.P. Mon . "Motion detector and analyzer". United States.
@article{osti_7042189,
title = {Motion detector and analyzer},
author = {Unruh, W.P.},
abstractNote = {Method and apparatus are provided for deriving positive and negative Doppler spectrum to enable analysis of objects in motion, and particularly, objects having rotary motion. First and second returned radar signals are mixed with internal signals to obtain an in-phase process signal and a quadrature process signal. A broad-band phase shifter shifts the quadrature signal through 90/degree/ relative to the in-phase signal over a predetermined frequency range. A pair of signals is output from the broad-band phase shifter which are then combined to provide a first side band signal which is functionally related to a negative Doppler shift spectrum. The distinct positive and negative Doppler spectra may then be analyzed for the motion characteristics of the object being examined.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {3}
}